Grain-door for box-cars.



. mamas-a. I PATENTED SEPT. 24, 19m.-

P. S. LARSON & R. O. DUEA.

GRAIN DOOR FOR BOX CARS. APPLICATION FILED MAY 17, 1906.

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PETER s. LARSON ANn'nANDoLPn o. .DUEA, OF SHARON, NORTH DAKOTA.

GRAIN-DOOR FOR' Box-cans.

Specification of Letters Patent.

Patented Sept. 24, 1907.

, Application filed May 17,1906. Serial No. 317,309-

To all whom it may concern:

Be it known that we, Barns S. LARSON and RA'N- m n C. Donn, citizens of the ignited States, residing at Sharon, in the county of Steele and State of North Dakota, have invented certain new and useful Improvements Grain-Doors for Box-Cars; and we do hereby declare the following tov be a iullfclear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same. I

Our invention has for its object to provide an improved grain door for box cars, and to this end it consists of the novel devices and combinations of devices hereinafter described and defined in the claims. In the accompanying drawings which illustrate the invention, like characters indicate like parts throughout the several views. Referring to the drawings, Figure 1 is a view in side elevation, showing the central portion of the 'body of a box car, having our improved grain doors applied thereto. Fig. 2 is a transverse section taken on the line 2: x of Fig. 1. ,Fig. 3 is a horizontal section taken on the line m x of Fig. 1. 4 is a vertical section taken on the line a x of Fig. l, showing the parts on an enlarged scale, Fig. 5 is a view taken from the inside of the car body, onan enlarged scale,

' 7 showing a portion oi the door frame and grain door, with 1. some parts broken away and some parts sectioned; and

I 6 is a vertical section taken on the line 91: x of The numeral 1 indicates a portion of the bodyof an ordihary box car, the same having, in its sides, the

-- usual door openings 2, to which door openings our im proved-grain doors 3 are applied.

5 Metallic face plates 4 are secured to each side of the dbor openings 2 and extend from the top to the bottom of said openings. Each face plate 4 is formed with a plate 4 downward for about two-thirds of the entire length of said plate 4. I

The guide channels 5 are, at their tops, curved out- "ward toward the right with respect toFig. 4, and ter- 1 :minate in seats 6 1 Said guide channels 5 are, at their l bottoms,.curved inward toward'the leit wi'th-respect .145 to Fig. 4, and terminate in entrance passages 7. The purpose of said seats 6 and entrance passages 7 will presently appear. I The grain door 3 is provided, at its sides and near its upper edge, with trunnions 8 adapted to work inthe guide channels 5. To secure the said door 3 in working position, the trunnions-are first inserted within the=en-.

' trance passages 7 and thence into the guide channnels 5. A pair of lock plates 9 are mounted on said grain door 3 by slot and pinconnections 10 for sliding movements toward and from each other. A lever 11 is pivoted near its lower end to the grain door 3 and may be held guide channel 5 extending from nearthe top of said stantlally as described.

. of two witnesses.

in any desired set position by a latch segment 12. A pair of links 13 pivoted one on either side of the pivots of said lever 11 and to the lock plates 9 connect said plates 9 for simultaneous movements in reverse directions. Slots affording lock plate seats 14 adapted to receive the lock plates 9 are formed in the face plates 4 running parallel to the guide grooves 5 and extending from the bottom of said face plates 4 upward for about one-half face-plates 4. 1

As is evident, when the lever 11 is in the position the entire length of said indicated in Fig. l, the lock plates 9 will be in engage ment with the lock plate seats 14. Thus, the grain door 3 is securely held in working position against either outward movements when the car is loaded with grain, or inward when the car is empty. By throwing the,

lever 11 in a reverse direction from that shown in Fig. v

1, the lock plates 9 will be withdrawn from the lock plate seats 14 through the link connections 13 thereby permitting the grain door 3 to swing outward on the trunnions 8,and releasing the load of grain withinthe car.

To secure the grain door in an idle position, the said door 3 is moved upward, the trunnions 8 sliding in the guide channels 5, until said trunnions 8 enter the seats 6. Said door 3' may then be swung up into the position indicated by dotted lines in Fig. 2 and held there by a hook 15. If desirable, a supplemental section 16 may be placed above the grain door 3, which section 16 may be held in working position by the flanged keeper 17.

Grain doors of the above character are very efficient for the purposes had in view, as it is very desirable to prevent the door from swinging inward when the cars are empty. Furthermore, the grain doors are of comparatively small post and may be easily applied to any and all box cars. v What I-claim is: V The'comblnation with a car body having a door opening,- metallic face plates secured to the oppositesides ofsslld door-opening and extendlng from thetop to thevbottom "thereof and formed with vertical lock plate seats and with vertical guide channels, said seatssnd channels laterally olfset and overlapping one another, and 'the'said channels terminating at their upper ends in seats and terminating at their lower ends in entrance passages, :of-n grain door having 'at its upper portionheaded trnnnlons adapted to enter said entrance passages and slide arid-work pivotally in said guide channels, and to enter saldseats for support ing said door in an elevated position, lock plates mounted on the ends of said grain door for movements toward and from each other and adapted to engage the lock plate seats of said face plates, and means for imparting slmultaneods movements to said lock plates in' reversedirections) sub-- In testimony whereof we aflix our signatures in presence PETEB.S. rIA'nsoN. I tANDOLPH C. DUEA.

Witnesses:

M. C. Duns; J. B. Larson. 

